The Lemon IndexBank 2 is getting too much air or too little fuel.
Get it fixed soon. A few more days of normal driving is usually OK, but waiting can turn a small repair into a bigger one or a breakdown.
Vacuum leak. Then: dirty MAF sensor; weak fuel pump or clogged filter.
Owners named P0174 in 53 complaints to the U.S. government, most often on the Ford Windstar.
Models that report it most
Complaints that name P0174, by model. Raw counts, not a failure rate: popular models get more complaints. Tap a model for its years, mileage and what owners say fixed it.
P0174 by model: P0174 Ford Windstar (18)
Years owners report it on most: 2000 Ford Windstar · 2001 Ford Windstar · 2002 Ford Windstar · 2003 Ford Windstar · 2008 Buick Enclave · 2019 Toyota Highlander
The details
What P0174 means
Bank 2 is getting too much air or too little fuel.
Can I drive with P0174?
Get it fixed soon. A few more days of normal driving is usually OK, but waiting can turn a small repair into a bigger one or a breakdown.
26% of the owner complaints that name P0174 also say the car brakes or ABS act up. A complaint can describe more than one problem, so this doesn't prove the code caused it.
Common causes of P0174
- Vacuum leak
- Dirty MAF sensor
- Weak fuel pump or clogged filter
A shop should confirm the cause with a scan and tests before replacing parts.
What owners describe
- Brakes or ABS act up: 26% of complaints
- Stalls or shuts off: 21% of complaints
- Shakes, runs rough or misfires: 19% of complaints
- Loses power or goes into limp mode: 15% of complaints
Share of complaints naming the code whose text also mentions each problem.
Model years that report P0174 most
2000 Ford Windstar (6), 2001 Ford Windstar (5), 2002 Ford Windstar (4), 2003 Ford Windstar (3), 2008 Buick Enclave (2), 2019 Toyota Highlander (2).
Related codes
P0175 P0172 P0171 P0170 P0190 P0191 P0192 P0193
Quick answers
What does P0174 mean?
System Too Lean (Bank 2). Bank 2 is getting too much air or too little fuel.
Can I drive with P0174?
Get it fixed soon. A few more days of normal driving is usually OK, but waiting can turn a small repair into a bigger one or a breakdown.
What causes P0174?
Vacuum leak; Dirty MAF sensor; Weak fuel pump or clogged filter.
Counts: NHTSA owner complaints whose text names P0174. A complaint is an owner's report, not a diagnosis. Meanings: the standard SAE J2012 definitions in our own words; manufacturer codes only where verified for that make. General information, not repair advice for your car.